Cr4+:YAG Crystal
(Chromium doped
yttrium aluminum garnet)

Chromium doped
yttrium aluminum garnet or Cr4+:YAG has higher damage threshold and is mostly used in passively Q-switching diode
pumped or lamp pumped passive Q-switching materials. Its main advantages
are high damage threshold, and absorptions wavelength of 900nm--1200nm,
and peak of around 1060nm with large absorption section.

Red Optronics supplies a wide variety of finished crystals. Our general production of Cr4+:YAG follows:

Main Specifications

Cr4+ dopant concentration:

0.5 mol% ~
3 mol%

Aperture:

2x2 ~
14x14mm

Length:

0.1 ~
12mm

Initial
transmission:

10% ~
99%

Coating:

Antireflective

Angle
tolerance:

Δθ< ±
0.5°; Δφ< ±0.5°

Dimension
tolerance:

(W ±
0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)

Flatness:

λ/8 @
633nm

Scratch/Dig code:

10/5 Scracth/dig per MIL-O-13830A

Parallelism:

better
than 20 arc seconds

Perpendicularity:

5 arc
minutes

Wavefront
distortion:

less than
λ/8 @ 633nm

Clear
aperture:

> 90%
central area

Note:
To inquire or order a
finished Cr4+ crystals, please provide specification
as listed above, particularly the size, initial transmission
and coatings.